Serpentronic
Robot Snake
Measuring 28 inches in length, this robot has the ability to move much like
a real snake. There are no wheels on the underside of the body. This is the
real thing! This robot is featured in the Amphibionics book.
Watch a movie...

Hexatron
Walking Robot Another six legged robot. This one uses a twin-motor gearbox
and an interesting mechanical configuration. Also, an inexpensive H-bridge motor
controller, leg position sensors, and the Sharp GP2D12 infrared sensor.

Bipedal Walking Robot
Walks on two legs with the help of a microcontroller and the same electronics
as the Hexatron robot. Also uses a twin-motor gearbox, an inexpensive H-bridge
motor controller, leg position sensors, and the Sharp GP2D12 infrared sensor.
Humanoid Robotics book.

Robot
Arm With Speech Recognition
This project is made up of four smaller components - the arm, gripper, serial
computer interface and the stand alone speech recognition circuit. The details
to build this fun project are included in my Humanoid Robotics book.